Answer
$(-\infty, 3)$
Work Step by Step
The graph is rising from the left up to $x=3$.
Thus, the function is increasing in the interval $(-\infty, 3)$.
Therefore, the largest open interval where the function increases is $(-\infty, 3)$.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises - Page 214: 9
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